| 1 | |
| 2 | *
|
| 3 | * Author: David S. Miller
|
| 4 | * License: GPL
|
| 5 | *
|
| 6 | * Copyright (C) 2008 David S. Miller <[email protected]>
|
| 7 |
|
| 8 |
|
| 9 | #include <linux/kernel.h>
|
| 10 | #include <linux/init.h>
|
| 11 | #include <linux/rtc.h>
|
| 12 | #include <linux/platform_device.h>
|
| 13 |
|
| 14 | #include <asm/oplib.h>
|
| 15 |
|
| 16 | static u32 starfire_get_time(void)
|
| 17 | {
|
| 18 | static char obp_gettod[32];
|
| 19 | static u32 unix_tod;
|
| 20 |
|
| 21 | sprintf(obp_gettod, "h# %08x unix-gettod",
|
| 22 | (unsigned int) (long) &unix_tod);
|
| 23 | prom_feval(obp_gettod);
|
| 24 |
|
| 25 | return unix_tod;
|
| 26 | }
|
| 27 |
|
| 28 | static int starfire_read_time(struct device *dev, struct rtc_time *tm)
|
| 29 | {
|
| 30 | rtc_time64_to_tm(starfire_get_time(), tm);
|
| 31 | return 0;
|
| 32 | }
|
| 33 |
|
| 34 | static const struct rtc_class_ops starfire_rtc_ops = {
|
| 35 | .read_time = starfire_read_time,
|
| 36 | };
|
| 37 |
|
| 38 | static int __init starfire_rtc_probe(struct platform_device *pdev)
|
| 39 | {
|
| 40 | struct rtc_device *rtc;
|
| 41 |
|
| 42 | rtc = devm_rtc_allocate_device(&pdev->dev);
|
| 43 | if (IS_ERR(rtc))
|
| 44 | return PTR_ERR(rtc);
|
| 45 |
|
| 46 | rtc->ops = &starfire_rtc_ops;
|
| 47 | rtc->range_max = U32_MAX;
|
| 48 |
|
| 49 | platform_set_drvdata(pdev, rtc);
|
| 50 |
|
| 51 | return devm_rtc_register_device(rtc);
|
| 52 | }
|
| 53 |
|
| 54 | static struct platform_driver starfire_rtc_driver = {
|
| 55 | .driver = {
|
| 56 | .name = "rtc-starfire",
|
| 57 | },
|
| 58 | };
|
| 59 |
|
| 60 | builtin_platform_driver_probe(starfire_rtc_driver, starfire_rtc_probe);
|